S.V. Mozhegova, I.L. Paizanskaya, R.S. Gerasimov, A.A. Alferova, E.M. Kravchenko
Study of Organic Matter thermal decomposition kinetics using pyro-GC method
DOI 10.47148/0016-7894-2024-4-57-68
Key words: kinetics; kerogen; Rock-Eval; pyro-GC; hydrocarbon generation; activation energy distribution; oil; gas; kinetic spectrum.
For citation: Mozhegova S.V., Paizanskaya I.L., Gerasimov R.S., Alferova A.A., Kravchenko E.M. Study of Organic Matter thermal decomposition kinetics using pyro-GC method. Geologiya nefti i gaza. 2024;(4):57–68. DOI: 10.47148/0016-7894-2024-4-57-68. In Russ.
The authors present the developed new original technique for hydrocarbon composition determination of kerogen pyrolysis products aimed at studying the kinetics of rock Organic Matter transformation and creating four-component kinetic spectra based on the results obtained by Rock-Eval and pyrolysis-gas chromatography methods. The example of different-age source rocks of the West Siberian basin is discussed. The Rock-Eval method allows obtaining information on the total amount of hydrocarbons formed from Organic Matter (kerogen), while pyrolytic chromatography makes it possible to quantitative relationship of different HC groups at each heating step. Pyrolysis of Organic Matter with subsequent analysis of hydrocarbon composition of the formed products allows obtaining multicomponent (gas, liquid hydrocarbons) spectra of generation potential distribution according to activation energy of reactions of kerogen conversion into hydrocarbons. Configuration of the spectra depends on kerogen structure; it is individual for each type of Organic Matter.
Svetlana V. Mozhegova ORCiD Scopus
Senior Researcher
Aprelevka Division
of All-Russian Research Geological Oil Institute,
1, 1st ul. Ketritsa, Aprelevka, 143363, Russia
e-mail: mozhegova@vnigni.ru
Irina L. Paizanskaya
Candidate of Chemical Sciences,
Head of the Laboratory of Organic Geochemistry
Aprelevka Division
of All-Russian Research Geological Oil Institute,
1, 1st ul. Ketritsa, Aprelevka, 143363, Russia
e-mail: payzianskaia@vnigni.ru
Roman S. Gerasimov
Researcher
Aprelevka Division
of All-Russian Research Geological Oil Institute,
1, 1st ul. Ketritsa, Aprelevka, 143363, Russia
e-mail: r.gerasimov@vnigni.ru
Anna A. Alferova
1st Category Engineer
Aprelevka Division
of All-Russian Research Geological Oil Institute,
1, 1st ul. Ketritsa, Aprelevka, 143363, Russia
e-mail: a.alferova@vnigni.ru
Elizaveta M. Kravchenko
1st Category Engineer
Aprelevka Division
of All-Russian Research Geological Oil Institute,
1, 1st ul. Ketritsa, Aprelevka, 143363, Russia
e-mail: e.kravchenko@vnigni.ru
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Section: Geochemical surveys